Getting started
Determine your app’s voice.
Match your tone to the context.
Be clear.
Write for everyone.
Best practices
Be action oriented.
Build language patterns.
Adopt capitalization rules that align with your app’s style, then apply them consistently.
Give clear guidance and use consistent language throughout processes with multiple steps.
Use possessive pronouns sparingly.
Write for how people use each device.
Provide clear next steps on any blank screens.
Write clear error messages.
Choose the right delivery method.
Keep settings labels clear and simple.
Show hints in text fields.
For the complete guidance, including worked examples and illustrations, see the canonical page: https://developer.apple.com/design/human-interface-guidelines/writing